Updated On September 23rd, 2025
Pet's info: Dog | Mixed Breed Large (61lb +) | Male | 1 year and 9 months old | 70 lbs
Pitbull got Imrab 3 TF and DApp today. He is lethargic and shaking like he is cold. Should I be worried?
2 Answers
Published on February 5th, 2018
Thanks for using Petco Pet Education Center, formerly Petcoach! Possible side effects after vaccines include pain at the injection site, lethargy, inappetence and general discomfort. This should subside within 1-2 days. If it does not improve or it worsens, have Boomer evaluated by a veterinarian for further assessment and treatment. Otherwise, Boomer will likely start feeling better shortly. Good luck and best wishes!
1Pet Parents found this answer helpful
Published on February 28th, 2019
This can happen after vaccines. If it lasts longer than 24 hours, have her rechecked by your veterinarian. Monitor for vomiting, diarrhea, difficulty breathing or any swelling. These can indicate a vaccine reaction and should be addressed immediately by your veterinarian or at the nearest veterinary ER.
1Pet Parents found this answer helpful
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